<template>
  <div class="wrapper" ref="wrapper">
    <div class="content">
      <slot></slot>
    </div>
  </div>
</template>

<script>
import BScroll from 'better-scroll'

export default {
  props: {
    probeType: {
      type: Number,
      default: 0
    },
    pullUpLoad: {
      type: Boolean,
      default: false
    }
  },
  data() {
    return {
      scroll: null
    }
  },
  mounted() {
     // 1.创建BScroll对象
      this.scroll = new BScroll(this.$refs.wrapper, {
        click: true,
        probeType: this.probeType,
        pullUpLoad: this.pullUpLoad
      });

      // 2.监听滚动的位置
      if(this.probeType === 2 || this.probeType === 3) {
        this.scroll.on('scroll', (position) => {
          this.$emit('scroll', position);
        });
      }

      // 3.监听上拉事件
      if(this.pullUpLoad) {
        this.scroll.on('pullingUp', () =>{
          this.$emit('pullingUp');
        });
      }
  },
  methods: {
    scrollTo(x, y, time=1000) {
      this.scroll && this.scroll.scrollTo(x, y, time);
    },
    finishPullUp() {
      this.scroll && this.scroll.finishPullUp();
    },
    refresh() {
      console.log("图片加载完成");
      this.scroll && this.scroll.refresh();
    },
    getScrollY() {
      return this.scroll ? this.scroll.y : 0;
    }
  }
}
</script>

<style scoped>

</style>